Preparation method of high temperature corrosion resistant flexible coating for fin heat exchanger
A fin heat exchanger, high temperature corrosion resistance technology, applied in anti-corrosion coatings, coatings, climate sustainability and other directions, can solve problems such as corrosion of warped heat exchangers, and achieve the effect of high heat resistance
Active Publication Date: 2019-02-05
七台河鑫科纳米新材料科技发展有限公司
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Problems solved by technology
More than 3 years of application have proved that this coating effectively solves the corrosion problem of the tilted heat exchanger for waste heat utilization
Method used
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[0047] The following is illustrated in conjunction with specific coating formulations, but these specific examples are not intended to limit the present invention. Specific coating formulations are shown below. Wherein the consumption of each described composition is gram.
[0048] Case 1. In a petrochemical refinery, the air preheater of the four-in-one heating furnace of the reforming unit is a vertical type 4500×3460×5050, with 650 Φ30×1 vacuum finned tubes, made of carbon steel. The flue gas temperature at the inlet and outlet of the heat pipe air preheater is about 120°C / 300°C. The flue gas contains a large amount of sulfur dioxide gas, which results in severe scaling and corrosion on the surface. The more severely corroded part is the flue gas outlet part, and some fins on the surface of the heat pipe have been corroded after being used for less than a year. At the same time, a large amount of fouling is formed on the surface of the heat pipe, which increases the ther...
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Abstract
The invention discloses a preparation method of a high-temperature corrosion resisting flexible paint special for a finned heat exchanger. The preparation method is mainly characterized by being prepared from, by weight, 33-80 parts of resin, 50-10 parts of filler, 5-20 parts of a silicon nano-polymer, 5-8 parts of a solvent, 1-10 parts of an anti-coagulant, 1-3 parts of a curing agent and 0.5-3 parts of an accelerant. The invention further discloses a preparation method of the silicon nano-polymer. The construction process includes the following steps that finned tubes are subjected to surface treatment, then the paint is sprayed, heating is performed for curing, and a uniform high-temperature corrosion resisting flexible coating is formed on the surface of each finned tube, wherein the uniform high-temperature corrosion resisting flexible coating can replace an enamel coating and be applied to heat exchange equipment in power plants, steel works, the petrochemical industry and the sulphuric acid industry under the condition of 180-220 DEG C, low-temperature wet gas heaters, smoke waste heat recovery and the like, and has broad application prospects. A processed sample is as shown in the attached map in the description.
Description
technical field [0001] The invention relates to the protection of plate and fin heat exchangers necessary for waste heat utilization in chemical industry, power plant, steelmaking plant, refinery and other related enterprises, replacing the traditional enamel coating. Background technique [0002] In contemporary times, environmental pollution has increasingly become a subject of widespread concern in countries all over the world, and energy conservation and emission reduction have become the primary tasks of countries and enterprises. Refining plants, power plants, steel mills, and large chemical enterprises will produce a large amount of high-temperature exhaust gas. For the recovery and utilization of exhaust gas waste heat and the limitation of exhaust gas discharge temperature, various heat exchange equipment must be used to lower the temperature of the exhaust gas. The large amount of waste heat carried recycle and re-use. The temperature of the exhaust gas is mostly ...
Claims
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IPC IPC(8): C09D201/06C09D5/08C09D7/61
CPCY02P20/10
Inventor 薛俊峰薛富津朱兰芬
Owner 七台河鑫科纳米新材料科技发展有限公司